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四川盆地须家河组坡折带发育特征及油气地质意义

陈友智 臧殿光 杨晓 巫芙蓉 梁虹 王晓阳 吴育林 郭冉 徐敏 陈颖 张帅 王鹏 应倩 赵振伟 陈娜

陈友智, 臧殿光, 杨晓, 巫芙蓉, 梁虹, 王晓阳, 吴育林, 郭冉, 徐敏, 陈颖, 张帅, 王鹏, 应倩, 赵振伟, 陈娜. 四川盆地须家河组坡折带发育特征及油气地质意义[J]. 石油实验地质, 2024, 46(3): 491-498. doi: 10.11781/sysydz202403491
引用本文: 陈友智, 臧殿光, 杨晓, 巫芙蓉, 梁虹, 王晓阳, 吴育林, 郭冉, 徐敏, 陈颖, 张帅, 王鹏, 应倩, 赵振伟, 陈娜. 四川盆地须家河组坡折带发育特征及油气地质意义[J]. 石油实验地质, 2024, 46(3): 491-498. doi: 10.11781/sysydz202403491
CHEN Youzhi, ZANG Dianguang, YANG Xiao, WU Furong, LIANG Hong, WANG Xiaoyang, WU Yulin, GUO Ran, XU Min, CHEN Ying, ZHANG Shuai, WANG Peng, YING Qian, ZHAO Zhenwei, CHEN Na. Development characteristics and oil-gas geological significance of slope break zone of Xujiahe Formation in Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 491-498. doi: 10.11781/sysydz202403491
Citation: CHEN Youzhi, ZANG Dianguang, YANG Xiao, WU Furong, LIANG Hong, WANG Xiaoyang, WU Yulin, GUO Ran, XU Min, CHEN Ying, ZHANG Shuai, WANG Peng, YING Qian, ZHAO Zhenwei, CHEN Na. Development characteristics and oil-gas geological significance of slope break zone of Xujiahe Formation in Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 491-498. doi: 10.11781/sysydz202403491

四川盆地须家河组坡折带发育特征及油气地质意义

doi: 10.11781/sysydz202403491
基金项目: 

国家科技重大专项 2017ZX05035003

详细信息
    作者简介:

    陈友智(1982—),男,博士,高级工程师,从事构造地质解释与盆地分析工作。E-mail: cugchenyz@126.com

  • 中图分类号: TE121.3

Development characteristics and oil-gas geological significance of slope break zone of Xujiahe Formation in Sichuan Basin

  • 摘要: 前人针对断陷盆地坡折带开展了大量研究,但前陆盆地前渊向前缘隆起方向坡度较缓,大型构造欠发育,地形起伏小,坡折带研究较少。四川盆地晚三叠世须家河组四、五段沉积时期发育前陆盆地,学者们已关注到泸州—开江古隆起西侧川中—川西地区缓坡坡折带对沉积岩相的控制,但其他相关研究较少。通过对四川盆地地震反射剖面坡折带构造解释,结合区域地质已有成果,采用颗粒流数值模拟方法,厘清了川中—川西地区坡折带类型,以及坡折带与重力滑动构造之间的关系,分析了与重力滑动构造相关的新型油气圈闭特征。研究获得如下认识:(1)研究区发育断裂坡折带,以坡折带为界,东、西两侧各发育一套重力滑动形成的“前挤后拉”构造组合,构造变形强度弱于被动大陆边缘重力滑动构造;(2)研究区构造坡折带边缘断裂控制沉积相与砂体类型;(3)缓坡带重力滑动构造拉张区正断层下盘上升形成同沉积背斜发育的砂岩,与同期断陷内富有机质泥岩侧接,形成“旁生侧储”型油气藏;(4)陡坡带重力滑动形成的须五段同沉积背斜,被翼部泥岩以及滑动构造结束后沉积的泥岩所围限,形成源内砂体输导成藏;(5)与重力滑动构造相关的同沉积背斜油气藏是源内成藏新类型,研究区须五段可能存在平行坡折带NE向展布的此类油气藏。

     

  • 图  1  四川盆地泸州古隆起西侧研究区位置

    研究区内彩图为须家河组时间厚度图,区域构造图修改自参考文献[13]。

    Figure  1.  Study area location on western side of Luzhou Palaeouplift in Sichuan Basin

    图  2  四川盆地须家河组坡折带地震剖面(a)及地质解释(b)

    剖面位置见图 1

    Figure  2.  Seismic profile (a) and geological interpretation (b) of slope break zone of Xujiahe Formation, Sichuan Basin

    图  3  四川盆地须家河组坡折带局部构造地震剖面

    剖面位置见图 2b

    Figure  3.  Seismic profile of local structure of slope break zone of Xujiahe Formation, Sichuan Basin

    图  4  颗粒流数值模拟四川盆地须家河组坡折带重力滑动构造演化

    Figure  4.  Particle flow numerical simulation of gravity slip structure evolution of slope break zone of Xujiahe Formation, Sichuan Basin

    图  5  前陆盆地(a)与被动大陆边缘(b)盐岩层重力滑动构造对比

    图b修改自参考文献[28]。

    Figure  5.  Comparison of gravity sliding structures in salt layers in foreland basin (a) and passive continental margin (b)

    图  6  四川盆地须家河组断裂坡折带对沉积相控制的地震剖面

    剖面位置见图 1

    Figure  6.  Seismic sections of sedimentary facies controlled by fault slope-break zone of Xujiahe Formation, Sichuan Basin

    图  7  四川盆地须家河组缓坡带须家河组四段同沉积背斜成藏模式

    Figure  7.  Syndepositional anticlinal reservoir formation model of 4th member of Xujiahe Formation in gentle slope zone of Xujiahe Formation, Sichuan Basin

    图  8  四川盆地须家河组陡坡带须家河组五段同沉积背斜地震剖面(a)与源内成藏模式(b)

    剖面位置见图 1

    Figure  8.  Seismic profile (a) and reservoir formation model (b) of syndepositional anticline in 5th member of steep slope zone of Xujiahe Formation, Sichuan Basin

    表  1  四川盆地须家河组坡折带数值模拟材料参数

    Table  1.   Material parameters for numerical simulation of slope break zone in Xujiahe Formation, Sichuan Basin

    实验材料 密度/(g/cm3) 颗粒半径/mm 法向刚度/(N/m) 切向刚度/(N/m) 摩擦系数 初始孔隙度/% 颗粒总数
    石英砂颗粒 2.6 0.09~0.11 3×107 3×107 0.277 12.4 3 058
    挡板 2.8 7.7×108 7.7×108 0.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-07-26
  • 修回日期:  2024-04-15
  • 刊出日期:  2024-05-28

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